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Pepr Overly Permissive RBAC ClusterRole in Admin Mode

Type: advisorySources: OSV

Pepr is a type safe K8s middleware. Prior to 1.0.5 , Pepr defaults to a cluster-admin RBAC configuration and does not explicitly force or enforce least-privilege guidance for module authors. The default behavior exists to make the “getting started” experience smooth: new users can experiment with Pepr and create resources dynamically without needing to pre-configure RBAC. This vulnerability is fixed in 1.0.5.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-23634
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 09:24 UTC · Revision 1

Source evidence

Pepr Overly Permissive RBAC ClusterRole in Admin Mode

core-osv · Original source

Published 16 Jan 2026, 19:14 UTC

Pepr is a type safe K8s middleware. Prior to 1.0.5 , Pepr defaults to a cluster-admin RBAC configuration and does not explicitly force or enforce least-privilege guidance for module authors. The default behavior exists to make the “getting started” experience smooth: new users can experiment with Pepr and create resources dynamically without needing to pre-configure RBAC. This vulnerability is fixed in 1.0.5.

osv:CVE-2026-23634
Complete source record
{
  "id": "a0842c026abe44a8d9fc1136a2a7b0c049d77136d6d28971437e8f555b65c809",
  "url": "https://osv.dev/vulnerability/CVE-2026-23634",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Pepr Overly Permissive RBAC ClusterRole in Admin Mode",
    "summary": "Pepr is a type safe K8s middleware. Prior to 1.0.5 , Pepr defaults to a cluster-admin RBAC configuration and does not explicitly force or enforce least-privilege guidance for module authors. The default behavior exists to make the “getting started” experience smooth: new users can experiment with Pepr and create resources dynamically without needing to pre-configure RBAC. This vulnerability is fixed in 1.0.5.",
    "evidence": "osv:CVE-2026-23634",
    "products": [],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-23634",
      "aliases": [
        "CVE-2026-23634",
        "GHSA-w54x-r83c-x79q"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/defenseunicorns/pepr",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "d4675a662b8602fcde7e4bf603432f2f133b1fd1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.0.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d4675a662b8602fcde7e4bf603432f2f133b1fd1"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.0.5"
                  },
                  {
                    "cpe": "cpe:2.3:a:defenseunicorns:pepr:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.0.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23634.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.188954633Z",
      "provider": "osv",
      "references": [
        "https://github.com/defenseunicorns/pepr/releases/tag/v1.0.5",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23634.json",
        "https://github.com/defenseunicorns/pepr/security/advisories/GHSA-w54x-r83c-x79q",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-23634"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-272"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23634.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-23634",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 518868,
  "published_at": "2026-01-16T19:14:46.483+00:00"
}